cross connect reliability

Luke S Crawford lsc at
Mon Sep 21 06:29:56 UTC 2009

Richard A Steenbergen <ras at> writes:
> You've never seen a single port go bad on a switch? I can't even count
> the number of times I've seen that happen. Not that I'm not suggesting 
> the OP wasn't the victim of a human error like unplugging the wrong port 
> and they just lied to him, that happens even more.

I know it happens;  it's happened to me, and I have probably touched fewer
switches than you.  Still, from what I can understand, it can be
prevented/minimized by the use of a grounded port.


"CAUTION: If you want to install the Switch using a Category 5E or
Category 6 cable, 3Com recommends that you briefly connect the cable
to a grounded port before you connect to the network equipment. If you
do not, the cable’s electrostatic discharge (ESD) may damage the Switch's

You can create a grounded port by connecting all wires at one end of a
UTP cable to an earth ground point, and the other end to a female RJ-45
connector located, for example, on a Switch rack or patch panel. The
RJ-45 connector is now a grounded port."

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